Titanic

The submarine vanished during a dive down to the Titanic wreck on Sunday. The confirmation of the sub's loss came after an extensive search mission. 

Other experts in the industry and a whistle-blowing employee raised alarms in 2018, criticizing OceanGate for opting against seeking certification and operating as an experimental vessel.

"The debris field here is consistent with a catastrophic implosion of the vehicle," Mauger said.

According to reports, the other submersible, called Limiting Factor, is owned by video game developer Valve Software CEO Gabe Newell. 

Sidonie Nargeolet said her 77-year-old father had been near the Titanic wreck 30 times, the first in 1987.

Rush, who is married to Wendy Rush, is chief executive of US-based OceanGate Expeditions which operates the Titan submersible.

OceanGate believes that the passengers on the Titan submersible have "sadly been lost" in a statement cited by CNN.

60-year-old Arthur Liobl described his trip aboard the Titan as a "suicide mission."

The issue was that OceanGate did not go through the industry's recognized certification process for the sub's design, fabrication and testing.

467336 (2002 LT38) is, if rounding up a bit, twice the size of the infamous sunken passenger liner, the Titanic, according to NASA. But we're in no danger of it hitting the Earth.